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Former Siebold Construction <br /> 820 South American Street - 2 - 4 June 2001 <br /> Based on the contamination identified at your site to date, a complete soil and groundwater <br /> investigation is required. By 27 July 2001,please submit a plan of work to this office to delineate the <br /> lateral and vertical extent of contamination at your site. The plan of work must be prepared according <br /> to Appendix A of the Tri-Regional Recommendations for Preliminary Investigation and Evaluation of <br /> Underground Storage Tank Sites (previously sent to you), and include the following: <br /> • A status report including site background, current site use, and a summary of all activities <br /> completed to investigate the extent of petroleum hydrocarbon contamination at your site. <br /> • A proposal to analyze all groundwater samples for TPHg, TPHd, BTEX, the fuel oxygenates <br /> (MTBE, TBA, ETBE, DIPE, TAME, Ethanol, and Methanol), and the fuel additives (ethylene <br /> dibromide and 1,2-dichloroethane). Please note that EPA Method 8260B is the preferred <br /> analytical method for determining the presence of fuel oxygenates and fuel additives. <br /> • A proposal to conduct a sensitive receptor survey. The survey is to include a search for all wells <br /> (municipal, domestic and agricultural), surface water bodies, schools, and other receptors within <br /> 2000 feet of site boundaries. Information for the survey must be obtained from field <br /> reconnaissance activities within 500 feet, local water purveyor(s), your well permitting agency, <br /> and the Department of Water Resources. All information must be plotted on a map, and a table <br /> of pertinent information and any available well logs included. <br /> Failure to comply with these requests may subject you to formal enforcement actions including <br /> monetary civil liability. If you have any questions or comments,please call me at (916) 255-3115. <br /> Marty Hartzell <br /> Associate Engineering Geologist <br /> Attachments <br /> cc: Ms. Sandy Gill, SWRCB Cleanup Fund, Sacramento <br /> Mr. Mark Owens, SWRCB Cleanup Fund, Sacramento <br /> Ms. Margaret Lagorio, San Joaquin County Environmental Health Division, Stockton <br />